Maybe the dog gets lost, and the boy goes on a long and difficult journey to find it. In the end, they are happily reunited. For example, the boy searches everywhere, asks people in the neighborhood, puts up posters, and finally finds his dog in an unexpected place like an abandoned building.
One possible ending could be that another kind player comes across the sad dog and decides to take it in as their own. The dog then gets a new home and is happy again.
One possible ending is that they find a way to turn the zombie boy back to normal and live happily ever after.
Perhaps the ending is more symbolic. The person who disappeared actually represents something that was lost within the characters or the community all along, and in the end, the characters come to realize this and start to make changes in their lives to fill that void, even though the physical person may never return.
One possible ending is that the girl manages to get the dog suit off just in time and realizes it was all a hallucination caused by some sort of drug or chemical on the suit. Another ending could be that she is stuck in the suit forever and slowly transforms into a real dog - like creature, living a life in misery.
Another ending might be that the man doesn't fully solve his problem but learns to live with it. He gains a new perspective on life and is more accepting of his situation. For example, if his problem was a physical disability, he might not be able to cure it but he could learn to adapt and find joy in other aspects of his life. In this way, the story could end on a more positive note of personal growth despite the unresolved problem.
One possible ending could be that the person who received the flowers finally understands the sender's feelings and they get together happily. For example, if it was a love - themed story and the roses sent worked their magic.
One possible ending is that they remain friends. As they grow up, they realize their feelings were more of a childish infatuation. So they stay good friends throughout their school years and beyond, sharing memories and still caring for each other in a platonic way.
Sadly, they might be separated by external factors like their families moving to different places. They try to keep in touch at first but gradually lose contact over the years. However, they always remember that special time in their childhood when they had those innocent feelings for each other.
One possible ending could be that the girl and the boy's act of cutting (maybe hair or something symbolic) brings their families closer. Their families, who were initially against their relationship or friendship, see their courage and determination and accept them as they are.
One possible ending is that they overcome all the social and economic differences and end up together happily. They prove that love can conquer all.